Dumbbell with adjustable weights



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v 'DUMBBELL WITH ADJUSTABLE WEIGHTS Filed March 26, 1952 Patented June 2, 1,:953

DUMBBELL 71TH ADJUSTABLE WEIGHTS Adalbert Lemieux,

Vancouver, British Columbia,` Canada Application March 26, 1952, Serial No.- 278,680:

6 Claims.

The present invention pertains to a novel exercising apparatus in the nature of a dumbbell or gymnasium bar.

The principal object of the invention is to provide a device of this character having adjustable weights on the ends with releasable means for clamping the weights tightly together. This means is in the form of an assembly which slides on the bar into engagement with the outermost Weight and is normally held against sliding in the opposite direction. However, the vlocking mechanism is easily releasable, so that the assembly may be withdrawn for adjusting the weights.

In the accomplishment of this object, the aforementioned assembly includes a nut slidable on the bar into vcontact with the outermost Weight and receiving a hollow screw which also slides on the bar. The screw carries a pivoted pawl engageable selectively with rack teeth formed on the bar. The screw is surrounded by a rotatable collar which covers the pawl and has a boss that holds the pawl in engagement with the rack teeth. f

The screw also carries a pin that enters the boss and holds the collar against relative rotation, so that the pawl remains locked in the teeth. To release the pawl, the pin is iirst withdrawn and the collar rotated to take the pressure off the working end of the pawl. The free end of the pawl is normally held in a cam notch formed in a flange of the collar. Thus, as the collar is turned, the free end of the pawl is engaged by a cam surface that lifts the working end away from the teeth.

The invention is fully disclosed by way of example in the following description and in the accompanying drawings in which:

Figure 1 is a side elevation of the device;

Figure 2 is an end view;

Figure 3 is a section on the line 3 3 of Figure 2;

Figure 4 is a cross section;

Figure 5 is a similar section on the line 5 5 of Figure 1;

Figure 6 is a detail longitudinal section, partly in elevation; and

Figure '1 is a detail perspective View.

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout.

The device includes a straight bar I of .uniform cross sectional shape and fitted at each end with a tubular cap 2 over a bronze bushing 3. Inasmuch as the assembly is the same at 55 each end, only one assembly will be described.

The inner end of each cap 2 is iianged at 4, and adjacent thereto is aflanged-bushing 5 fastened to the bar I by screws 6. The bushing is surrounded by a liner 1 and then by a collar 8 fastened to the flange by screws 9.

Each cap 2 is formed with a longitudinal series of rack teeth III for a purpose that will presently be described. A desired number of Weight disks I I are slipped over the cap and against the ange 4 `Whichvvis heldv onto reinforced bar by the assembly 5 9. An oversized nut I 2 is slid over the. cap 2 and against the outermost disk II. The purpose of the nut is to clamp the disks togeteher, and this is accomplished by the means that will'nowlbe described.

A hollow screw I3. with a flanged head I4 is adapted to be screwed into the nut I2 but is preassembled with other parts before this is done. Beneath the flange I4 is a rotary collar I5. In the screw I3 is a cross pin I6 pivotally supporting a pawl I1, one end I8 of which is adapted to engage the teeth I0. A ring I9 screws on a larger thread 20 of the screw I3 to retain the collar I5.

The inner end of the collar I5 has an inward flange 2I formed with a cam notch" 2'2 adapted to receive the free end of the pawl I1 as will presently be described. Opposite the notch 22, the collar I5 has an inward boss 23 with a longitudinal hole 24. A flat spring 25 is attached to the top of the head I4 at one end by a screw 26, and the remaining end carries a pin 21 adapted to enter the hole 24, to lock the collar against rotation. The screw I3 .has a key 28 received in a longitudinal slot 29 in the cap 2, whereby the screw and nut are prevented from turning after the assembly has been made.

It will be noted that in the locking position, the boss 23 holds the pawl I1 in engagement with the teeth I Il, the pawl being carried by the screw I3. The slope of the teeth lIl'is such that the pawl may slide with the assembly toward the weights II but not in the opposite direction. When it is desired to release the pawl for adjusting the weights, the free end of the spring 25 is lifted by the nger to release the pin 21 from the boss 23. The collar I5 is then turned so that the boss 23 moves away from the pawl and the ange 2| cams over the free end of the pawl to lift its Working end I8 out of the notches. I2 21 can now be withdrawn from the cap 2 to permit adjustment of the weights, after which this assembly is restored to the position shown in Figure 3.

Although a specic embodiment of the inven- The assembly`A tion has been illustrated and described, it will be understood that various alterations in the details of construction may be made without departing from the scope of the invention as indicated by the appended claims.

What I claim is:

l. Exercising apparatus comprising an elongated bar havingv a, series otraek teeth at one end, Weights removably mounted onssaid end, an assembly on said end and bearing against the outermost Weight, a pawl carried by said assembly and engageable with said teeth, a collar rotatably surrounding said pawl and. having a boss holding said pawl in engagement with said teeth, and releasable means for locking said' collar "to said assembly.

2. Exercising apparatus comprising an elongated bar having a series of rack teeth `,at.one end, weights removably mounted on said end, an

assembly .011 Said end and bearing against the outermost weight, agpawlgcarried by said'assembly and engageabley with' saidrteeth, a collarrotatably surrounding said pawl and having a boss holding said pawlin engagement with saidtee'th, and. releasable means-f for locking-said "collar: l' to said assembly, said collar havinga ange with a cam notch receiving the freeend ofl said-pawi, whereby said pawl is-lifted `froml said teeth on releasing said means iandturning said -collar.

3. Exercising apparatus comprising an elongated bar having a series of rack teeth at one end, weights `removably mounted onsaidend, lan assembly on saidend and-bearing iagainst the outermost Weight, a pawl carried by said assembly and engageable with'saidteeth, a collar rotatably/'surrounding said pawl and'fhaving a boss holding said pawl in engagement with'said teeth, a fiat. spring having one-,endl fastened to the head of said, assembly,-and a pirr on they other end of said spring and receivable linsaidboss.

fi, Exercising apparatus; comprising 11'61011- gated bar having `a series ofrack-"teethatfone end, weights removably mounted lon said end, an assemblyv on said end and bearing against the outermostweight, a pawlcarried-by said; assembly and engageable with said teeth, a collar rotatably surrounding said paWl and having a boss holding said pawl in engagement with said teeth, a fiat spring having one end fastened to the head of said assembly, and a pin on the other end of said spring and receivable in said boss, said collar having a iiange with a cam notch receiving the free end of said pawl, whereby said pawl is lifted from said teeth on releasing said pin and turning said collar.

v5. Exercising apparatus comprising an elongated bar having a series of rack teeth at one end', weights removably mounted on said end, a nut on said end and bearing against the outermost-Weight, a hollow screw in said nut, a pawl carried by said screw and engageable with said teethfa -collarl rotatably surrounding said pawl and having a boss holding said pawl in engagement4 with said teeth, and releasable means for locking said collar to said screw. A .6.IExercisingfxapparatus 'comprising an elongated'barhavingfaseries of :rack teeth at one end, weights removably mounted 'on said end, a nutonsaid: end and .bearing against the outermost".-;veig`l1tf,` 'a 'hollowfscrew'in said nut, a pawl carried-by saidscrew and engageable 'Av/ith said teeth, a: collar.v rotatably'surrounding said pawl and having afboss 'holding saidi pawlI in' engage ment:withsaidfteeth,"fand releasable means for locking said collar izo-,said "screw, said collar having ailange with a cam .notchVV receiving' the free endrcf' said pawl, wherebysaid pawl is lifted fromsaid teeth on releasingl said means and turning said collar. ADALBERT LEMEUX.

References Cited in the iile of this patent burnin 'STATES PA'I'ENT'- fs 

